To help you get the most from the text and keep track of what's happening, we've used several conventions throughout the book.
WARNING Boxes like this one hold important, not-to-be forgotten information that is directly relevant to the surrounding text.
COMMON MISTAKES These areas hold important information about common mistakes that can be made while coding a particular feature.
NOTE Tips, hints, tricks, and asides to the current discussion look like this.
As for other conventions in the text:
This book uses monofont type with no highlighting for most code examples. This book also uses bold to emphasize code that is of particular importance in the present context.